Final answer:
Epics do not necessarily center on a single hero but can have multiple heroes or a collective hero.
Step-by-step explanation:
Epics are concerned with the fate of nations, but they do not necessarily center on a single hero. While many epics have a central hero, such as Odysseus in the 'Odyssey' or Beowulf in 'Beowulf', there are also epics that feature multiple heroes or a collective hero, such as the 'Iliad', which focuses on the events of the Trojan War and the actions of various Greek and Trojan warriors.